3146728 has 32 divisors (see below), whose sum is σ = 6451200. Its totient is φ = 1430208.

The previous prime is 3146719. The next prime is 3146729. The reversal of 3146728 is 8276413.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 3146728.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3146729) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8025 + ... + 8407.

It is an arithmetic number, because the mean of its divisors is an integer number (201600).

Almost surely, 2^3146728 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3146728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3225600).

3146728 is an abundant number, since it is smaller than the sum of its proper divisors (3304472).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3146728 is a wasteful number, since it uses less digits than its factorization.

3146728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 481 (or 477 counting only the distinct ones).

The product of its digits is 8064, while the sum is 31.

The square root of 3146728 is about 1773.9019138611. The cubic root of 3146728 is about 146.5389475825.

The spelling of 3146728 in words is "three million, one hundred forty-six thousand, seven hundred twenty-eight".